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Archive through August 08, 2012
- Thread starter fcurrier
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Brian i had an experience with my 169 (solid mounted engine) similar to yours. It had way to much vibration at low speed. I loosened the engine bolts and alligned the engine with the driveshaft. It helped a lot. The second time i mowed the lawn the problem got worse. I had used the wrong flex discs in the drive shaft. I got it shut off just before the driveshaft went south. Could this be a part of your problem? Check for the correct discs, use lock nuts and don't overtighten them.
Don H., Tom might have the answer as well. Check the gas cap to make sure the little vent hole in it is not plugged. If it is plugged as the gas is used up the gas tank can develop a vacuum and then the gas won't flow out properly. Does it run OK now that it's cooled down? If it happens again loosen the cap and see if it sucks air in. That would indicate that the vent is plugged.
Sure seems like the Quiet Line tractors are getting a LOT of discussion lately.
I was actually thinking about that Sunday afternoon while mowing with my K321 powered #72, that I have very... VERY little vibration. Must be the balancing Dave Kirk did to the rotating assembly.
I was actually thinking about that Sunday afternoon while mowing with my K321 powered #72, that I have very... VERY little vibration. Must be the balancing Dave Kirk did to the rotating assembly.
Denny, funny you mention that, I had the same thoughts yesterday evening when I mowed with my Killer Kohler powered 125. David did a great job balancing the K301 when he rebuilt it for me.
Marlin,
You're right, my break-in time is whatever it took to adjust the carb after engine rebuild, probably less than an hour. However, I don't see how more time is going to get rid of all that vibration, but I could be wrong. I have the rear end torn down right now so I can't run it.
When I get it all back together, I'm going to take another look at the mounts and re-adjust them, then run it for awhile for a good break-in. I'll let you know.
Thanks
You're right, my break-in time is whatever it took to adjust the carb after engine rebuild, probably less than an hour. However, I don't see how more time is going to get rid of all that vibration, but I could be wrong. I have the rear end torn down right now so I can't run it.
When I get it all back together, I'm going to take another look at the mounts and re-adjust them, then run it for awhile for a good break-in. I'll let you know.
Thanks
Brian,
Check the engine RPM. The Operators Manual for the quietlines list the idle speed as 1800 RPM's for ALL quietline engines from the 8 hp K181AQS to the 16 hp K341AQS. With an idle speed much below this even the 8 hp engine will shake (and whistle like it has a vacuum leak). The service manual for the QL's tells you to make the idle adjustment at an engine speed of not less than 1000 RPM and to adjust until the smoothest idle is obtained. After any governor adjustments are made check the minimum and maximum engine speeds. Max "no load" engine speed is 3600 RPM
Check the engine RPM. The Operators Manual for the quietlines list the idle speed as 1800 RPM's for ALL quietline engines from the 8 hp K181AQS to the 16 hp K341AQS. With an idle speed much below this even the 8 hp engine will shake (and whistle like it has a vacuum leak). The service manual for the QL's tells you to make the idle adjustment at an engine speed of not less than 1000 RPM and to adjust until the smoothest idle is obtained. After any governor adjustments are made check the minimum and maximum engine speeds. Max "no load" engine speed is 3600 RPM
mhomrighausen
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- Marlin Homrighausen
Norm B. As for re-adjusting the isomounts after you get things back together. I'd suggest leaving everything as is for now. By re-adjusting those bolts/mounts you run the risk of setting everything where it will need to start all over again for the break-in period.
Back to work...
Back to work...
sblunier
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- Steve Blunier "Mr. Plow" (Central IL)
What's mowing????? My grass just crunches...... I did knock down the buckhorn weeds once in July....but that's the only thing I did, and the grass sure didn't need mowing...just the weeds!!!!
BTW, my boxer twins don't shake much at all.....
BTW, my boxer twins don't shake much at all.....
I'll throw my tip in on ISO mounts and how to make sure everything is right that an individual tractor, as they are all different!
Change the mounts, leave them a little loose. Replace and lightly tighten the flex couplings.
Remove the coil wire, turn the key to roll the engine over about 20 or 30 revolutions. With everything fairly loose at the start, things will settle into line when the engine stops. Move nothing! Tighten everything back up, leave 2 or 3 threads showing on the ISO mount bolts. Tighten the flex couplings. Put everything back together and go Cubbin!
I've done that routine on all 6 of my QL's and never had an issue or an excess of vibration except in one of the 1650's and I did have to adjust the mounts one time by loosing the nuts 1/8 of a turn after about 10 minutes run time.
And like paul said, 90% of all QL's will rattle your teeth if the idle is not set right and some of the 1650's will rattle your teeth at WOT! LOL
Change the mounts, leave them a little loose. Replace and lightly tighten the flex couplings.
Remove the coil wire, turn the key to roll the engine over about 20 or 30 revolutions. With everything fairly loose at the start, things will settle into line when the engine stops. Move nothing! Tighten everything back up, leave 2 or 3 threads showing on the ISO mount bolts. Tighten the flex couplings. Put everything back together and go Cubbin!
I've done that routine on all 6 of my QL's and never had an issue or an excess of vibration except in one of the 1650's and I did have to adjust the mounts one time by loosing the nuts 1/8 of a turn after about 10 minutes run time.
And like paul said, 90% of all QL's will rattle your teeth if the idle is not set right and some of the 1650's will rattle your teeth at WOT! LOL
kide
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- Gerry Ide
Since I usually set the idle low on the 129, it almost dances when sitting still.. BTW - I've got my butt chewed by small engine doctors more than once for setting the idle speed too low, as plain bearings need surface speed to build the cushion of oil (the way it works is almost like a boat getting up on plane, either pushing oil ahead of the low point in the crank/bearing rotating assembly or as speed builds up, planing more on top of the cushion of oil). And then there's a rubber mounted 103 CID Harley at idle......
Would that be the Ide is to slow and the idle to high? Or visa versa?
Just want to say thanks to those that chimed in regarding a no spark issue on my 1650. Turns out the wire to the points had a break inside. Darndest thing. It gave me a good understanding on the ignition system and using the multimeter. Everything checked out ok so I probed the wire @ 8" before the points w/the tester and it showed 12.7 volts. The wire at the points showed zero. Saw a bend in the wire and there it was. Boy did it feel good to pin that down.
Regards,
David
Regards,
David
kide
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Charlie:
Yes....
David .. First cause is usually the the damping (centering) springs in the trunion assembly getting weak and/or being fixed by stacking washers behind them.. Read this bit from the FAQs, in fact read all the bits about hydro adjustments in the FAQs. Don't expect the worse, usually fairly simple... (Under edit - looks like I'm answering a question that might have disappeared or my brain is wayyyyy too slow, like Digger sez)
Yes....
David .. First cause is usually the the damping (centering) springs in the trunion assembly getting weak and/or being fixed by stacking washers behind them.. Read this bit from the FAQs, in fact read all the bits about hydro adjustments in the FAQs. Don't expect the worse, usually fairly simple... (Under edit - looks like I'm answering a question that might have disappeared or my brain is wayyyyy too slow, like Digger sez)
Anyone with info as to why my timed belt rides up on the right side drive pulley....looked at the washers...seem to be right from the web site....probably something simple and stupid...just consider the person asking the question.
Thanks for any help.
Thanks for any help.
Rick Albert
I don`t mean to poop on you but ! you must be talking a timed deck on an Original ? If you have the belt adjusted to tight it will run high. I would give the belt some slack and turn it over and see if the belt runs up on the pulley.
I don`t mean to poop on you but ! you must be talking a timed deck on an Original ? If you have the belt adjusted to tight it will run high. I would give the belt some slack and turn it over and see if the belt runs up on the pulley.
